Having a few extra gallons of water around just makes things easier. Unfortunately, having a giant, empty container around doesn’t. Therein lies the beauty of the Platypus Water Tanks. Collapsible by nature, they pack flat for efficient packing and the Big Zip^™ opening makes filling and cleaning a breeze. The biggest, 6L tank weighs a mere 4.4 oz (124g), making it just as practical for group backpacks and river trips as it is for summers on the road. New features include a new, more durable film, a lower, more stable design and reinforced handles for easy carrying.